Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e820e2ea64366f…

MALICIOUS

PDF

44.5 KB Created: 2020-08-15 04:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: edef1b7801023b37fff33d5c04dbaaa8 SHA-1: da5f86433027b9b92ddcf0327d94f520f0bf221c SHA-256: 12e820e2ea64366fc4e244454a9078b5a6864ab7c90866176e1918b01311b59e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=thesis+writing+guide+gcuf In PDF document text
    • http://kemalikej.aartstudio.ca/uploads/1/3/2/6/132696323/6684728.pdfIn PDF document text
    • http://files.lifechurchoftitusville.com/uploads/1/3/1/4/131406344/duturapezefikino.pdfIn PDF document text
    • http://files.foodloveblog.com/uploads/1/3/1/3/131380868/vosirijofa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/45095326699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/ina_pillow_block_bearing_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/absolute_value_function_graph_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tatefusazikegopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/85039875952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/69123500144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/animator_s_survival_kit_portugues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/89704889215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4084/5469/files/water_bottle_manufacturing_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/xilegezifapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/msxml_4._0_sp3_parser.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 5084 bytes
SHA-256: 65db1ef36384752ba3f3e832eef6ff1269d82a8eee1714f83f924b2bbda303e0
font_01_sfnt_off00008248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8248 10296 bytes
SHA-256: de208cf74859aa451c9ebbb640a03f72a833c083de8a0607e439a77f63398a29

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